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-rw-r--r--lib/axlsx/workbook/worksheet/col.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/axlsx/workbook/worksheet/col.rb b/lib/axlsx/workbook/worksheet/col.rb
index 37c38365..10d421e8 100644
--- a/lib/axlsx/workbook/worksheet/col.rb
+++ b/lib/axlsx/workbook/worksheet/col.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
module Axlsx
# The Col class defines column attributes for columns in sheets.
class Col